INFRASTRUCTURE
INFRASTRUCTURE
Problems that arise within a city’s infrastructure can be very costly, especially when considering full depth operations. Nortex specializes in innovative repairs to address leaks, voids and deterioration of large diameter pipes, culverts and other associated structures including manholes and drop inlets. We have the knowledge and experience to fix these issues, avoiding costly repairs and providing a time efficient solution.
INFRASTRUCTURE PROJECTS
CORRUGATED DRAINAGE PIPES
Due to the nature of issues associated within a city’s infrastructure, solutions almost always include excavation, proving to be quite costly and time consuming. However, the solution Nortex provides for these types of problems require no excavation at all. In addition to that, our solution avoids costly repairs and long periods of down-time.
The project below shows how high-density foam was used to support this large corrugated plastic drainage pipe from being crushed by the soils above it. This pipe was located under a bridge and was used as a conduit for the stream that flowed beneath it. In addition to strengthening the pipe from the overbearing weight, the foam provides excellent insulation from outside elements, and does not expand or contract under the fluctuation of hot and cold temperatures.
In the project below, it can be seen how polyurethane foam was injected in the annular space between the corrugated slip lining pipe and the culvert. There were a total of five adjacent pipes, in which three of them needed foam injection. The foam was injected throughout the length of the culvert.
LEAKING BOX CULVERT
The projects pictured below shows how the foam can be used to stop water infiltration through a joint in a box culvert. In addition to eliminating leaks, the foam will fill any voids created by the infiltration of water. Here, a crew member injected high-density polyurethane foam along the leaking joint from the inside of the culvert. The foam pushed out any water from the outside of the culvert, compacted the wet soils around it, and finally sealed the leaking joint. Once the joint was completely sealed, the excess foam along the joint was removed. The project was completed in two hours.
LEAKING DRAINAGE PIPES
The projects below depict two separate leaking drainage pipes in which polyurethane foam injection was used to stop the leaking and fill the voids around the outside of the joints. The erosion from water infiltration had caused the concrete road above it to start cracking and settling under its own weight, due to the presence of large voids around the leaking joints. Luckily, these leaking pipes were caught were found before they had enough time to do any further damage. After injection, the leaking joints were sealed, the voids were filled, and the concrete road above was lifted back into place.
SETTLED DROP INLET
The project below pictures a drop inlet that had settled due to poor compaction of foundation soils when it was installed. High-density polyurethane foam was injected beneath the inlet to lift it back into place in just a few hours.
During the injection process, the foam will not provide any vertical lift until it has first filled all voids, and has compacted and strengthened the soils beneath the inlet. At Nortex, we have designed the foam to do this on purpose. If the foam only provided lift, then the inlet would eventually settle again. The compaction and stabilization of foundation soils is the main priority. This enables the foam to be a long-lasting solution, providing stability that will keep this drop inlet in its proper position for years.
